Toward creating simpler hydrological models: A LASSO subset selection approach
文献类型：SCI/SSCI论文
| 作者 | Bardsley W. E.; Vetrova, V.; Liu, S. |
| 发表日期 | 2015 |
| 关键词 | Model simplification Linear basis functions Linear LASSO Subset selection Finite mixture distributions Linear programming Runoff model Groundwater model environmental systems regression shrinkage variable selection stable estimator unit-hydrograph linear-models complexity uncertainty calibration simplicity |
| 英文摘要 | A formalised means of simplifying hydrological models concurrent with calibration is proposed for use when nonlinear models can be initially formulated as over-parameterised constrained absolute deviation regressions of nonlinear expressions. This provides a flexible modelling framework for approximation of nonlinear situations, while allowing the models to be amenable to algorithmic simplification. The degree of simplification is controlled by a user-specified forcing parameter lambda. That is, an original over-parameterised linear model is reduced to a simpler working model which is no more complex than required for a given application. The degree of simplification is a compromise between two factors. With weak simplification most parameters will remain, risking calibration overfitting. On the other hand, a high degree of simplification generates inflexible models. The linear LASSO (Least Absolute Shrinkage and Selection Operator) is utilised for the simplification process because of its ability to deal with linear constraints in the over-parameterised initial model. (C) 2015 Elsevier Ltd. All rights reserved. |
| 出处 | Environmental Modelling & Software |
| 卷 | 72 |
| 页 | 33-43 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1364-8152 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38550]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Bardsley W. E.,Vetrova, V.,Liu, S.. Toward creating simpler hydrological models: A LASSO subset selection approach. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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